86 patients with severre hyponatremia were studied in this paper.The causes were related tovomiting

diarrliea and diuretics.The condition of 52 cases were very severre.56 cases who could notbe corrected died.Severe hyponatremic patients between 127 survivor and 59 died cases werecompared and analysed in detail.The results show that the prognosis of severe hyponatreinia ispoor.Therefore

the treahoent must be active as to reduce mortality.